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KTM 690 SM SUPERMOTO GP1 + medium
Yamaha TDM 900 2002-2009
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Honda VFR 1200 F 2010-2018
Front sprocket JT JTF423,18 JTF522 KTM 690 SM SUPERMOTO GP1JT JTF423 18T Front sprocket JT JTF423 is the 18T front sprocket option when you want OE style fit with a gearing tweak. JT part number: JTF423 Tooth count: 18 Position: Front Precision machined tooth profile for smooth engagement Material: SCM420 chromoly steel alloy (JT front sprocket grade). Gearing note: A tooth count change tunes final drive ratio (rear up front down = more torque; rear down front up = more top speed). Fitment: JT part numbers
